(Cat? OR feline) AND NOT dog?
Cat? W/5 behavior
(Cat? OR feline) AND traits
Cat AND charact*

This guide provides a more detailed description of the syntax that is supported along with examples.

This search box also supports the look-up of an IP.com Digital Signature (also referred to as Fingerprint); enter the 72-, 48-, or 32-character code to retrieve details of the associated file or submission.

Concept Search - What can I type?

For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.

Concept search eliminates the need for complex Boolean syntax to inform retrieval. Our Semantic Gist engine uses advanced cognitive semantic analysis to extract the meaning of data. This reduces the chances of missing valuable information, that may result from traditional keyword searching.

A Diagnostic to Validate Wetting Current and Measure Switch Contact Resistance Degradation

Publishing Venue

The IP.com Prior Art Database

Abstract

Automotive vehicles and industrial applications employ numerous switches of various types. Even though today’s switch detection systems apply a wetting current to burn off contact oxide, excessive contact resistance can still produce false detections. A methodology, using the existing features in a switch detection system, to validate the wetting current actually flows and to measure changes in contact resistance thereby providing the ability to monitor system health and develop a preventative maintenance schedule is presented.

Country

United States

Language

English (United States)

This text was extracted from a Microsoft Word document.

At least one non-text object (such as an image or picture) has been suppressed.

This is the abbreviated version, containing approximately
53% of the total text.

Title:
A Diagnostic
to Validate Wetting Current and Measure Switch Contact Resistance Degradation

Abstract: Automotive
vehicles and industrial applications employ numerous switches of various
types. Even though today’s switch
detection systems apply a wetting current to burn off contact oxide, excessive
contact resistance can still produce false detections. A methodology, using the existing features
in a switch detection system, to validate the wetting current actually flows
and to measure changes in contact resistance thereby providing the ability to
monitor system health and develop a preventative maintenance schedule is presented.

A
Diagnostic
to Validate Wetting Current and Measure Switch Contact Resistance Degradation

Unlike the simple powered
switches and relays (figure 1) used in cars 30 years ago, today’s systems of
automotive vehicles, industrial and automated applications, employ unpowered
switches whose state must be detected.

Figure 1 Powered switch Figure 2 System
for operating windows

The switch is part of a
control loop (figure 2) consisting of an unpowered switch, a switch detection
circuit, a master controller and an output device. Switch detection is comprised of two (2)
separate elements, an applied current and a voltage measurement, performing
three (3) operations: a forcing function to establish the voltage to be
measured, a wetting current to burn off oxidation on the switch contacts and
the detection of the switch state. Integrated
circuit (IC) implementations of switch detection may also require an external
ESD capacitor and a series...